SVAR restrictions

[CAMdon]

Hi. I hope someone can help me with my question. I don't think it is particularly difficult but I can't work out how to do it. I would be most grateful for some help :) :)

Basically I have a unrestricted VAR with 5 endogenous variables. I want to impose some Short Run restrictions for my impulse response analysis. For example, I want one variable to remain 0 when the shock hits; ie the contemporaneous impact on that variable is 0. I then need need a second restriction that another variable must respond negatively to the shock. i.e.: its impact to the shock must be lower than 0.

I hope someone can advise me how to do this in eviews!

Thanks